From April 1 to 3, 2026, the 14th Energy Storage International Summit and Exhibition (ESIE2026) will be held in Beijing. Haichen Energy Storage presented its full-scene energy storage solution, focusing on innovations such as the ∞ Cell 1175Ah long-term energy storage battery and system, and the AIDC full-term energy storage solution. At the exhibition site, Haichen Energy Storage officially announced the complete results of its ∞ Power 6.25MWh 4-hour long-term energy storage system large-scale fire test, and obtained the large-scale fire test certification issued by the international authoritative organization UL Solutions. This is the world's first long-term energy storage system with a thousand-hour battery core to open the door and fire test, setting a new industry benchmark for the safety verification of long-term energy storage systems.
Achievements Sharing to Promote Industry Safety Awareness Upgrading
exhibition, Haichen Energy Storage held "the world's first large-scale fire test UL certification ceremony for super-thousand-hour battery energy storage system". At the meeting, Chen Jiawu, head of Haichen energy storage combustion test project and senior fire protection design engineer, introduced in detail the design idea and implementation process of the test. The test video played on the spot showed the whole test process, key technical nodes and final data results.
Through this open and transparent technology sharing, Haichen Energy Storage has transformed an extreme safety verification into a perceptible and reusable industry experience, further strengthening the industry consensus that the safety of long-term energy storage systems has moved from "controllable design" to "safe and identifiable.
UL on-site certification, system safety recognized by international authority
in the certification process, Chen chi, senior product manager of the asia-pacific region of UL Solutions energy and automation division, said that UL 9540A version 6 (released in March 2026) had upgraded the safety verification from battery core and module to the real fire scene at the whole cabinet and whole station level. The Haichen Energy Storage is equipped with a thousand-hour-class 6.25MWh long-term energy storage system to carry out a full-door large-scale fire test in strict accordance with this version, simulating the most dangerous "no closed protection" full combustion environment. The reliability of the passive safety design of the long-term energy storage system is proved by the successful limit verification, which provides an important practical reference for the improvement of the global energy storage safety standard.
The certification marks Haichen energy storage product safety has reached the international leading level. As UL 9540A version 6 has been adopted by regulators in the United States, Europe, Australia, the Middle East and other countries as an additional requirement for market access, this test means that its 6.25MWh long-term energy storage system has met the above stringent market access conditions, laying a solid foundation for the global layout.
is safe and can be seen. the world's first 6.25MWh 4h long-term energy storage system limit test
previously, under the witness of UL Solutions and other authoritative organizations and experts, the 6.25MWh 4h long-term energy storage system carried out limit fire verification in strict accordance with the latest UL9540A2025 and NFPA855-2026 standards. The test set the prefabricated cabin to maintain a fully open state, the cabin body "back-to-back, shoulder-to-shoulder" double 15cm limit spacing, the battery core full power 100 SOC operation, and actively shut down the active fire protection system and other multiple harsh boundary conditions, fully verify the overall safety capability of the high energy density energy storage system.
The test results show that under the condition of continuous combustion, the system successfully controlled the fire in a single prefabricated cabin without intercompartment heat spread. After the combustion, the steel cabin structure remained intact without obvious collapse or structural deformation, which confirmed its reliable quality of structural integrity and functional isolation under real fire environment, for the global long-term energy storage scale landing provides a reproducible, traceable, trustworthy safety engineering model.
ecological linkage, "lighthouse factory" leads intelligent building to a new height
at the exhibition site, Haichen energy storage has jointly created interesting interactive clock-in activities with several ecological partners. around the core advantages of ∞ Cell 1175Ah long-term energy storage battery core, two characteristic links are set up: "joint booth product clock-in" and "main booth lighthouse factory theme clock-in, attracted a large number of audience stop exchange, depth experience.
it is worth noting that in January 2026, Haichen energy storage Chongqing base was awarded the world's first "lighthouse factory" in the energy storage battery industry, with the world's first long-term energy storage dedicated battery production line. The base has deployed more than 40 digital solutions, deeply integrating cutting-edge technologies such as generative artificial intelligence, ML and artificial intelligence Internet of Things (AIoT), and has built a full-chain intelligent management and control system covering research and development, material selection, production and manufacturing to finished product inspection, thus building the foundation of energy storage batteries in high safety, high reliability and high performance with extreme consistency. The live interactive activities let the audience feel the global leading strength of Haichen energy storage in the field of long-term energy storage technology and extreme intelligent manufacturing.
taking the results of this fire test as the safety cornerstone, combined with the technological innovation of ∞ Cell 1175Ah kanh battery cell and the extreme intelligent manufacturing capability of Chongqing's "lighthouse factory", Haichen energy storage is accelerating the large-scale application of long-term energy storage.
In the future, Haichen Energy Storage will continue to focus on the long-term energy storage core track, with safe and verifiable product power, large-scale delivery of performance, full-scene coverage of the program power, hand in hand with global partners, to promote the high-quality development of the energy storage industry, to help the global energy transformation steady and far.